hiking, biking, pilates... [ woman ] brooke... okay. i wear yoga pants because i am too lazy for real pants. that's my tide. what's yours? i wear yoga pants because i am too lazy for real pants. introducing crest 3d white enamel renewal toothpaste. it not only removes up to 90% of surface stains in just two weeks, it also strengthens and rebuilds your enamel. new crest 3d white enamel renewal toothpaste. life opens up when you do. >>>en this july 4th holiday weekend we're celebrating the beauty of america's national parks including a spectacular glacier park. at jenna bush hager reports, it is a sight to see. >> reporter: the crown of the continent, where two countries unite above land carved by ancient glaciers. gleaning lakes, with storied peaks and wild flowers cascade along the foothills of the continental divide. glacier became the country's tenth national park more than 100 years ago, a century before that, blackbeat indians roamed this corner of northwest montana and named their land the backbone of the world, and it's easy to se